Example Question #1 : Number Sense And Operations
David sees apples on the apple tree. If he picks of them, how many will be left?
To solve this problem we will subtract because David is taking away apples.
We can start at and count back .
Example Question #2 : Number Sense And Operations
When we subtract from a two digit number, the only number that changes in our answer is the tens position, and it will always go down by . Mentally, we can subtract from the number in the tens place to find our answer.
Example Question #3 : Number Sense And Operations
Fill in the blank
, , __________ , ,
In this series we are adding each time, or counting by .
, , , and .
Example Question #4 : Number Sense And Operations
What digit is in the ones place?
The ones place is always the first number on the right.